#define ehci_warn(ehci, fmt, args...) \
dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
-#ifdef EHCI_VERBOSE_DEBUG
+#ifdef VERBOSE_DEBUG
# define vdbg dbg
# define ehci_vdbg ehci_dbg
#else
static void __maybe_unused
dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
{
+ struct ehci_qh_hw *hw = qh->hw;
+
ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
- qh, qh->hw_next, qh->hw_info1, qh->hw_info2,
- qh->hw_current);
- dbg_qtd ("overlay", ehci, (struct ehci_qtd *) &qh->hw_qtd_next);
+ qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
+ dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
}
static void __maybe_unused
#else
-/* troubleshooting help: expose state in sysfs */
+/* troubleshooting help: expose state in debugfs */
+
+static int debug_async_open(struct inode *, struct file *);
+static int debug_periodic_open(struct inode *, struct file *);
+static int debug_registers_open(struct inode *, struct file *);
+static int debug_async_open(struct inode *, struct file *);
+static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
+static int debug_close(struct inode *, struct file *);
+
+static const struct file_operations debug_async_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_async_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+static const struct file_operations debug_periodic_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_periodic_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+static const struct file_operations debug_registers_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_registers_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+
+static struct dentry *ehci_debug_root;
+
+struct debug_buffer {
+ ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
+ struct usb_bus *bus;
+ struct mutex mutex; /* protect filling of buffer */
+ size_t count; /* number of characters filled into buffer */
+ char *output_buf;
+ size_t alloc_size;
+};
#define speed_char(info1) ({ char tmp; \
switch (info1 & (3 << 12)) { \
unsigned size = *sizep;
char *next = *nextp;
char mark;
- u32 list_end = EHCI_LIST_END(ehci);
+ __le32 list_end = EHCI_LIST_END(ehci);
+ struct ehci_qh_hw *hw = qh->hw;
- if (qh->hw_qtd_next == list_end) /* NEC does this */
+ if (hw->hw_qtd_next == list_end) /* NEC does this */
mark = '@';
else
- mark = token_mark(ehci, qh->hw_token);
+ mark = token_mark(ehci, hw->hw_token);
if (mark == '/') { /* qh_alt_next controls qh advance? */
- if ((qh->hw_alt_next & QTD_MASK(ehci))
- == ehci->async->hw_alt_next)
+ if ((hw->hw_alt_next & QTD_MASK(ehci))
+ == ehci->async->hw->hw_alt_next)
mark = '#'; /* blocked */
- else if (qh->hw_alt_next == list_end)
+ else if (hw->hw_alt_next == list_end)
mark = '.'; /* use hw_qtd_next */
/* else alt_next points to some other qtd */
}
- scratch = hc32_to_cpup(ehci, &qh->hw_info1);
- hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &qh->hw_current) : 0;
+ scratch = hc32_to_cpup(ehci, &hw->hw_info1);
+ hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
temp = scnprintf (next, size,
"qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
qh, scratch & 0x007f,
speed_char (scratch),
(scratch >> 8) & 0x000f,
- scratch, hc32_to_cpup(ehci, &qh->hw_info2),
- hc32_to_cpup(ehci, &qh->hw_token), mark,
- (cpu_to_hc32(ehci, QTD_TOGGLE) & qh->hw_token)
+ scratch, hc32_to_cpup(ehci, &hw->hw_info2),
+ hc32_to_cpup(ehci, &hw->hw_token), mark,
+ (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
? "data1" : "data0",
- (hc32_to_cpup(ehci, &qh->hw_alt_next) >> 1) & 0x0f);
+ (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
size -= temp;
next += temp;
mark = ' ';
if (hw_curr == td->qtd_dma)
mark = '*';
- else if (qh->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
+ else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
mark = '+';
else if (QTD_LENGTH (scratch)) {
- if (td->hw_alt_next == ehci->async->hw_alt_next)
+ if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
mark = '#';
else if (td->hw_alt_next != list_end)
mark = '/';
(scratch >> 16) & 0x7fff,
scratch,
td->urb);
- if (temp < 0)
- temp = 0;
- else if (size < temp)
+ if (size < temp)
temp = size;
size -= temp;
next += temp;
}
temp = snprintf (next, size, "\n");
- if (temp < 0)
- temp = 0;
- else if (size < temp)
+ if (size < temp)
temp = size;
size -= temp;
next += temp;
*nextp = next;
}
-static ssize_t
-show_async (struct class_device *class_dev, char *buf)
+static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
- struct usb_bus *bus;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
unsigned long flags;
char *next;
struct ehci_qh *qh;
- *buf = 0;
-
- bus = class_get_devdata(class_dev);
- hcd = bus_to_hcd(bus);
+ hcd = bus_to_hcd(buf->bus);
ehci = hcd_to_ehci (hcd);
- next = buf;
- size = PAGE_SIZE;
+ next = buf->output_buf;
+ size = buf->alloc_size;
+
+ *next = 0;
/* dumps a snapshot of the async schedule.
* usually empty except for long-term bulk reads, or head.
}
spin_unlock_irqrestore (&ehci->lock, flags);
- return strlen (buf);
+ return strlen(buf->output_buf);
}
-static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
#define DBG_SCHED_LIMIT 64
-
-static ssize_t
-show_periodic (struct class_device *class_dev, char *buf)
+static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
{
- struct usb_bus *bus;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
unsigned long flags;
return 0;
seen_count = 0;
- bus = class_get_devdata(class_dev);
- hcd = bus_to_hcd(bus);
+ hcd = bus_to_hcd(buf->bus);
ehci = hcd_to_ehci (hcd);
- next = buf;
- size = PAGE_SIZE;
+ next = buf->output_buf;
+ size = buf->alloc_size;
temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
size -= temp;
next += temp;
do {
+ struct ehci_qh_hw *hw;
+
switch (hc32_to_cpu(ehci, tag)) {
case Q_TYPE_QH:
+ hw = p.qh->hw;
temp = scnprintf (next, size, " qh%d-%04x/%p",
p.qh->period,
hc32_to_cpup(ehci,
- &p.qh->hw_info2)
+ &hw->hw_info2)
/* uframe masks */
& (QH_CMASK | QH_SMASK),
p.qh);
for (temp = 0; temp < seen_count; temp++) {
if (seen [temp].ptr != p.ptr)
continue;
- if (p.qh->qh_next.ptr)
+ if (p.qh->qh_next.ptr) {
temp = scnprintf (next, size,
" ...");
- p.ptr = NULL;
+ size -= temp;
+ next += temp;
+ }
break;
}
/* show more info the first time around */
- if (temp == seen_count && p.ptr) {
+ if (temp == seen_count) {
u32 scratch = hc32_to_cpup(ehci,
- &p.qh->hw_info1);
+ &hw->hw_info1);
struct ehci_qtd *qtd;
char *type = "";
} else
temp = 0;
if (p.qh) {
- tag = Q_NEXT_TYPE(ehci, p.qh->hw_next);
+ tag = Q_NEXT_TYPE(ehci, hw->hw_next);
p = p.qh->qh_next;
}
break;
spin_unlock_irqrestore (&ehci->lock, flags);
kfree (seen);
- return PAGE_SIZE - size;
+ return buf->alloc_size - size;
}
-static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
-
#undef DBG_SCHED_LIMIT
-static ssize_t
-show_registers (struct class_device *class_dev, char *buf)
+static ssize_t fill_registers_buffer(struct debug_buffer *buf)
{
- struct usb_bus *bus;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
unsigned long flags;
static char fmt [] = "%*s\n";
static char label [] = "";
- bus = class_get_devdata(class_dev);
- hcd = bus_to_hcd(bus);
+ hcd = bus_to_hcd(buf->bus);
ehci = hcd_to_ehci (hcd);
- next = buf;
- size = PAGE_SIZE;
+ next = buf->output_buf;
+ size = buf->alloc_size;
spin_lock_irqsave (&ehci->lock, flags);
- if (bus->controller->power.power_state.event) {
+ if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
size = scnprintf (next, size,
- "bus %s, device %s (driver " DRIVER_VERSION ")\n"
+ "bus %s, device %s\n"
"%s\n"
"SUSPENDED (no register access)\n",
hcd->self.controller->bus->name,
- hcd->self.controller->bus_id,
+ dev_name(hcd->self.controller),
hcd->product_desc);
goto done;
}
/* Capability Registers */
i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
temp = scnprintf (next, size,
- "bus %s, device %s (driver " DRIVER_VERSION ")\n"
+ "bus %s, device %s\n"
"%s\n"
"EHCI %x.%02x, hcd state %d\n",
hcd->self.controller->bus->name,
- hcd->self.controller->bus_id,
+ dev_name(hcd->self.controller),
hcd->product_desc,
i >> 8, i & 0x0ff, hcd->state);
size -= temp;
}
if (ehci->reclaim) {
- temp = scnprintf (next, size, "reclaim qh %p%s\n",
- ehci->reclaim,
- ehci->reclaim_ready ? " ready" : "");
+ temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
size -= temp;
next += temp;
}
done:
spin_unlock_irqrestore (&ehci->lock, flags);
- return PAGE_SIZE - size;
+ return buf->alloc_size - size;
}
-static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
-static inline void create_debug_files (struct ehci_hcd *ehci)
+static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
+ ssize_t (*fill_func)(struct debug_buffer *))
{
- struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
- int retval;
+ struct debug_buffer *buf;
+
+ buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
+
+ if (buf) {
+ buf->bus = bus;
+ buf->fill_func = fill_func;
+ mutex_init(&buf->mutex);
+ buf->alloc_size = PAGE_SIZE;
+ }
- retval = class_device_create_file(cldev, &class_device_attr_async);
- retval = class_device_create_file(cldev, &class_device_attr_periodic);
- retval = class_device_create_file(cldev, &class_device_attr_registers);
+ return buf;
}
-static inline void remove_debug_files (struct ehci_hcd *ehci)
+static int fill_buffer(struct debug_buffer *buf)
{
- struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
+ int ret = 0;
+
+ if (!buf->output_buf)
+ buf->output_buf = (char *)vmalloc(buf->alloc_size);
- class_device_remove_file(cldev, &class_device_attr_async);
- class_device_remove_file(cldev, &class_device_attr_periodic);
- class_device_remove_file(cldev, &class_device_attr_registers);
+ if (!buf->output_buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = buf->fill_func(buf);
+
+ if (ret >= 0) {
+ buf->count = ret;
+ ret = 0;
+ }
+
+out:
+ return ret;
}
-#endif /* STUB_DEBUG_FILES */
+static ssize_t debug_output(struct file *file, char __user *user_buf,
+ size_t len, loff_t *offset)
+{
+ struct debug_buffer *buf = file->private_data;
+ int ret = 0;
+
+ mutex_lock(&buf->mutex);
+ if (buf->count == 0) {
+ ret = fill_buffer(buf);
+ if (ret != 0) {
+ mutex_unlock(&buf->mutex);
+ goto out;
+ }
+ }
+ mutex_unlock(&buf->mutex);
+
+ ret = simple_read_from_buffer(user_buf, len, offset,
+ buf->output_buf, buf->count);
+
+out:
+ return ret;
+
+}
+static int debug_close(struct inode *inode, struct file *file)
+{
+ struct debug_buffer *buf = file->private_data;
+
+ if (buf) {
+ vfree(buf->output_buf);
+ kfree(buf);
+ }
+
+ return 0;
+}
+static int debug_async_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static int debug_periodic_open(struct inode *inode, struct file *file)
+{
+ struct debug_buffer *buf;
+ buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
+ if (!buf)
+ return -ENOMEM;
+
+ buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
+ file->private_data = buf;
+ return 0;
+}
+
+static int debug_registers_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private,
+ fill_registers_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static inline void create_debug_files (struct ehci_hcd *ehci)
+{
+ struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
+
+ ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
+ if (!ehci->debug_dir)
+ goto dir_error;
+
+ ehci->debug_async = debugfs_create_file("async", S_IRUGO,
+ ehci->debug_dir, bus,
+ &debug_async_fops);
+ if (!ehci->debug_async)
+ goto async_error;
+
+ ehci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
+ ehci->debug_dir, bus,
+ &debug_periodic_fops);
+ if (!ehci->debug_periodic)
+ goto periodic_error;
+
+ ehci->debug_registers = debugfs_create_file("registers", S_IRUGO,
+ ehci->debug_dir, bus,
+ &debug_registers_fops);
+ if (!ehci->debug_registers)
+ goto registers_error;
+ return;
+
+registers_error:
+ debugfs_remove(ehci->debug_periodic);
+periodic_error:
+ debugfs_remove(ehci->debug_async);
+async_error:
+ debugfs_remove(ehci->debug_dir);
+dir_error:
+ ehci->debug_periodic = NULL;
+ ehci->debug_async = NULL;
+ ehci->debug_dir = NULL;
+}
+
+static inline void remove_debug_files (struct ehci_hcd *ehci)
+{
+ debugfs_remove(ehci->debug_registers);
+ debugfs_remove(ehci->debug_periodic);
+ debugfs_remove(ehci->debug_async);
+ debugfs_remove(ehci->debug_dir);
+}
+
+#endif /* STUB_DEBUG_FILES */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff